1997 Jul 15

13

Philips Semiconductors

Product specification

Clock/calendar with 240

× 8-bit RAM

PCF8583

Fig.11 Alarm and timer interrupt logic diagram.

(1) If the alarm enable bit of the control/status register is reset (logic 0), a 1 Hz signal can be observed on the interrupt pin INT.

handbook, full pagewidth

MBD818

76

543

210

CONTROL/STATUS

REGISTER

(1)

alarm

interrupt

timer overflow

interrupt

INT

765

432

10

alarm

control

timer

alarm

overflow

timer

control

clock

alarm

ALARM

TIMER

CLOCK/CALENDAR

counter

control

mode

select

MUX

oscillator

ALARM

CONTROL

REGISTER